Change one Letter

fin -> fix

fix --> mix

mix---Nix (Nix is a natural satellite of Pluto.)

nix -> nip

nip- Nap

BPG~

Nap >> Tap

Tap -> ant

ant --> and

and ==> den

den --> pen

pen -> pet

pet ☺☺ pea

pea -> pas

pas ==> sad

sad >> dad

dad>>>> bad

bad >>> bed

bed -> fed

fed >>> led

led >>> leg

leg >>> gal

gal ==> pal

pal >>> lip

lip >> lid

lid >>> dig

dig >>>> gig

gig >>> egg

egg >>> gag

gag >>> lag

lag >>>>> sag

sag >>> say

say >>> lay

lay >>> bay

bay >>>> buy

buy >>> rub

rub >>> rum

rum >>> arm

arm -> mar

mar >>> bar

bar>>> rub